Use completing the square to solve for x in the equation (x-12)(x+4)=9

(x-12)(x+4)=9
   +12    -4 +8
(x)(x)=17
x^2=17
x=1 or 7

Can I get brainliest please?

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*